After the Dark Side Ride, both my NiteRider halogen and Blackburn Flea (on high-mode for most of the ride) were completely tapped out. I used my Mini-Maglite to finish the ride home. It is okay as a "to be seen" light, and for 12-MPH pothole patrol. I whipped this mount up a few months ago, but I rarely need to use the Mini-Mag. It usually stays tucked away in a pannier or my pocket. This light has been retrofitted with aftermarket electronics, LED bulb and upgraded optics.